Abrasive element for reciprocating grinders.



W, D. GHERKY.

ABRASIVE ELEMENT FOR REGIPROGATING GRINDERS.

APPLICATION FILED M3114, 1913. LGQQQM. Patentad May 5, 19145;

2 BHEBT5SHEET l.

Qwuawtoa W. D GHER-KY, ABRASIVE ELEMENT FOR REGIPROCATING GRINDERS.

APPLICATION FILED JANA, 1913.

2 SHEETS-SHEET 2. I

Patented May 5, 1914.

"WILLIAM D. GHERKY, F PHILADELPHIA. PENNSYLVANIA.

ABRASIVE EILEIEENT FOR HECIPROCATING GBINDERS.

Qriginal application filed lune 5. 1912, krial No. 701329.

1 :1 uZZ 26 w). it 1/2 (13 mice/'11.

Be itknown that i, \Ylldd an .1 (ii-iI-Stb. 1', 1 citizen of the l -niied Slides. re.-uhn; ill- 1 Specification 01' Letters Patent.

hiludehghia, in the county of Philadelphia t and ititute of Pcnnsvlrania. have invented certain new and useful Improvements in;

iibrz-isive Elements for (hinders, of which the following: is :1 spec} li -zition. reference being had therein to the :zrconrpunying drawing.

.iiy invention relates to grinding; niarl ines, and especially to the grinding cleznents used therein.

it contemplates certain structural improvements in the type of machine described and, claimed in Letters Patent No. 94%,147, granted to Henry B. Nichols, December w th. and the provision of 11 special form of "11;; brick for use therein.

' appli ation a division of my eoapplication Serial Number 701.929, Juno th, 1912, and is directed particuto eorcr the grinding: brick as an dbl?!- cicinent.

object of my invention is to produce millingelement of the general type zi on'n in the :iichols Patent, which may be t ed as 1 unit without the use of an in side 'lrunic or intermediate carriage.

.l attain my object by providing a longiludinullv reeiproeuting frame or carriage. ing in n ixcd plane. horizontally. and I r pe-ml the ri'lVliH therein by means to be ned so at they may be raised and cred \YlClnHu'. raising or lowering the carl hile grinding, the bricks are clamped to prevent knocking iw h lost motion edgewise, the clamping A n n bein 'released in raising or lOW- e: mg the bricks. if desired, or so hgh'tly sci.

:5. I re iiclis, with means to suspend the x llr-retronz. and :1 feed screw carried by the iwizuo -nt curl-urge. for raising and lowl ing the la! 14 its through the gem-y of therunuucn ull.

' :n .eni i-'-u ls illustrated 1n the neeonr puny ug rim-wine" in which:

Figu e l is u le iew oi :1 portion Oi. a grinding u nl-hine A the Nichols typz-a. with my nnprwsemenis up die'l YlIEIJQ IO.

Reciprocating lowered.

Patented May 5, 191%. Divided and. this application filed January 4,

Serial No. 740.205.

is u trzumerw weti uul view taken on the line 2 mt Fig". l. nu-l Figs. 2 and 2' are (ltlilll: cl puriuir llillr used between the grinding bricks. Figs. 5 lo 8 are detailed views of dillerent forms of suspension nn-uns tor the bricks. the form shown in Fig. it being; the same as that shown. in Figs. 1 and "3. Fig. 9 is in detail sectional View on the line 9 4) o'l Fig. l.

In the drawings I have illustrated only one end of the machine, comprising a portion of the frame 1, one of the tandem track wheels :2, the handle 12, and a portion of the reciprocating connecting rod 15. which is Sllppflflil to be driven buck and forth horizontally by any suitable motor device, as for example that described in the Nichols Patent aforesaid. or in my own prior applications.

Referring particularly to Figs. 1 andQ, the main frame is composed of side channels 1 and l". between which the carriage 3, connected by the knuckle joint with the connecting rod 13, slides back and forth in horizontal fixed guides '1"-11-1 bolted on the opposite Sides of the fame 1, as best shown in Fig. 3. The carriage 3 is substantially a reetnnguli ir box open above and below with one end 2') vertical and the other end 3* obliquely inclined for a purpose to be explained. Projecting horizontally from opposite sides of the carriage are the integral i'lzlHQ'QS 3 and P), which travel bew en the guides 1l 11. Above the; (infringe. and spanning its opening, is the bridge 7, having sides 7 and a crown 7 with an upwardly projecting collar 7 slotted to receive one or more lateral projections 9* on a'nut 9 internally threaded to receive the vertical feed screw 8, by means of which the grinding elements or units are raised or This screw carries at its upper end a hand-wheel 8", and at its lower end has a reduced neck 8 and a head 8", to engngc the clamping bar 6.

krl'illlfl'eil vertically in the carriage 3 is a 100 tandem grinding element 4 composed of a plurality of units as 4. el 4 and 4. These are held uguinst lateral motion by directengagement with the sides of the carriage 3, by whichthey are reciprocated back and 105 forth along the top of the rail to be, ground. in such grinding, it is necessary to provide some means for preventing motion of the bricks edgewise. that is to say in the direction of travel of tn carriage. For this pur- 119 pose i provide an end wedge 33. one side of which is vertical and engages the end brick l through a distance piece or separator while the other side of the wedge is inclined 5 to engage the inclined end 3* of the carriage. The wedge is vertically movable by means or a ecrew' 11 working in a bridge. or pro jeetion on the carriage. and eoi'ilrolled by means oi? a hand-wheel ll. This wedge 19 may he -Forced down firmly as to iorco together'the bricks and the interposed separators or Figs. 33 and 2*, against any motion, hut preferably it is adjusted so thal' ihc engagement of the l.')1"l(?l' and separators is 5 suiiicient to prevent knocking during; grind ing, hut is insuliicient to prevent raising and lowering f the bricks in the carriage. 'lhe COl'lFll'llfi'lOfl and arrangement of these hriclca is the ClHiIZL'IBlQXflS-ilC flllillllfisl' eased 2o l'ial feature of my invention. In all the machines heretofore used and if within my knowledge, in which similar bricks are employed, the have heen clamped in an inner frame or holder, which was adapted to travel vertic: ily in slides in the carriage, but to reciprocate therewith. inch an arrange ment has serious drawbacks. Not only must the excessive weight of {he brick-holder he reciprocnted. l ul' it in lllll70ll3l0 to keep out endwise play and consequent knocking be tween the inner holder and the carriage or outer frame. Such knocking results in rapid deterioration and serious annoyance, eepecially when the machine being used at night, which the exigencies of railway iratfie generally require .la'ioreover. such a, construction canes a cemiplicution of parts and resultant increase in coht well as coei of maintenance.

4o ficcor e: to my present invention, l'lilClbll-Qif .r or iiner frame. is diapensed with, the bricks heing merely dropped loosely into the single frame or carriage slightly wedged lenpzth 50 ot the carriage to take one the .lrnoclr. and held to a straight surface for the rail and for vertical adjustment by means of a common bar 3 extending above and along their upper ends. Each brick or unit is iudividmilly secured so to this bar, by means which I willnow describe, as such means form a part of my invention.

in Figs. 1 and 6 I have shown. and shall specifically claim herein, the preferred form 55 of attachment or suspension device. but I also illustrate in 3- l---5-7 and S several modifications outofinany which may I be resorted to if desired, all of which are intended to be included within the scope of the generic-claims appended hereto.

Referring to Figs. 1 and 6, the body of the brick 4; is provided with ,a stud hole 5 made while the brick is soft, during the process oi? manufacture, and slightly underout, as shown. A headed stud 4?, prefer;

ably of metal, is inserted in the hole, with iis expanded lowerend 4 at the bottom thereof. The brick and the stud or rivet are held in a jig, and Babbitt metal, lead, or other molten material poured in to fill the hole. When this material hardens the rivet or stud is integrally attached to the brick. The preferable material I employ for the filli 1g is sulfur, as it appears to give the heel results in practice, and its use avoids the needy for undercutting the stud hole 45*; also, the lower end of the stud may simply be scrcwlhreaded or otherwise notched, for engagement With the sulfur.

Referring to Fig. 3, a stud l of metal is shown secured to one side of a double clamp d dwhich engages a dovetail projection with undercut sides, shown at 49. The two halves oi. the clamp are secured together by a rivet or bolt 41. In this case the dovetail. formed fore. and aft, that is to say on the narrow ends of the brick.

'ii'rlfigr. tlic stud. is eliminated, and the bar 6 which will be presently described. is provided with a transverse doveiail channel. lilting over a complementary dovetail l on the upper end of the brick 4.

In Fig. 5 the stud 4 is again employed, but is coi'inccted to a separator block 4 lying between the bricks, and having opposite flanges engaging corii'espondinggdepressions l in the bricks. In this case one stud is common to two bricks.

Figs. '7 and 8 show simple forms of brick, each with a transverse opening i through it to receive a transverse pin passing through the opp Le sides or cars on the common har G. The form in Fig". 8 in addition is shouldered at 4%".

lletu lug now to Fig. l, but referring also for modifications to Figs, 3--l-5-7 and 8. the bricks are all held in and are raised and lowered by means of the common her (3. This bar is composed oi two halves in the form shown in Fig. as best indicated at 6 and 6 in Fiji. 2, halves having eoni 'ileinentary scmi-cylindrical channels G and 6*, the former (6 exending all the way through the liar from Top to hot-ton), to receive the studs L, and the latter 6) coming down half way from the top and of a diaincier no receive the neck 8" of the. screw 8, and hold the head 8 in the channel. The two halves of the car may have dowels to aline. them, and are bolted together as indicated in Fi 1. B

removing the bolts, not only is the bar detached from the screw 8. but it is also simultaneously detached from all. the grinding units.

Attached to the screi'i beneath the bridge 7 is a collar 8, and; depending from the underside of the bridge crown is a flanged sleeve Around this sleeve, and hearing against the bridge crown at its upper'end the two and the collar 8 at its lower end is a pressure spring 10. which tends constantly to force down the screw. the, bar, and the bricks.

Having thus described my invention what I claim and desire to secure by Letters Patcut 151-- 1, An abrasive element for use in a machine of the class described, comprising a body with clainping faces. a grinding face, and a projecting stud or head integrally secared to the body for the purposes of adjustment.

2. An abrasive element for use in a ma-.

chine of the character described comprising a block of abrasive material, having one face 'constitutin a, grinding face, and another a fastening ace, the latter provided with an under-cut recess adapted to receive fastening means fastening means within said recess and material cast Within said recess around said fastening means and retaining said fastening means fixedly embedded therein.

3. An abrasive element for use in a machine of the class described comprising an elongated polygonal block of abrasive material, having. one end face constituting a grinding face, side faces constituting clamping faces, and the other end face constituting a fastening face, the latter provided 30 another a fastening face, the latter being 40 recessed to receive fastening means, together with fastening means secured in said recess by cast sulfur.

In testimony whereof I affix my signature in presence oftwo witnesses.

WILLIAM n. GHERKY,

lVitnesses JAMES S. CLIFFORD, WM. B. GOODALL. 

